96 Jeep Cherokee hard to start

My Jeep Cherokee has recently become difficult to start when cold. It runs great once started, no misfires or hesitation. Based on info from other sources, I have tested my fuel pressure. This was 50 psi with only a 5 psi drop after 30 minutes. So pump, regulator, and injectors seem leak free and functional. Distributor, plugs, and wires are less than a year old. 285,00 miles. Where should I go next?

It could be a vacuum line issue. You can "Double Prime" the engine
when this happens and it will fix it. What you do is Basically turn the
key on, then off, then on again and it will double prime the fuel
pump. You may benefit from a block heater.

Repeated priming has been a mixed bag. If
it's been sitting, I generally have to try
repeatedly. Also, the pump does not
automatically shut off after a couple
seconds as is typical. This happens until I
have tried to crank it a few times, then it will
perform the usual prime for two seconds
and stop after turning the key to the on
position. Sometimes it starts at this point,
but other times it won't. On this model,
there is no vacuum line to the regulator. It is
a single line with no return, regulator is in
the tank as a part of the fuel pump
assembly. Is that the vacuum line you were
referring to?

Your Answer

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